A 4.5kg object and a 11.0kg object, both resting on a fricitionless table, are c

Question

A 4.5kg object and a 11.0kg object, both resting on a fricitionless table, are connected by a massless compressed spring. The spring is released and the objects fly off in opposite directions. The 4.5kg object has a velocity of 6.0m/s to the left. What is the velocity of the 11.0 object? A 4.5kg object and a 11.0kg object, both resting on a fricitionless table, are connected by a massless compressed spring. The spring is released and the objects fly off in opposite directions. The 4.5kg object has a velocity of 6.0m/s to the left. What is the velocity of the 11.0 object? A 4.5kg object and a 11.0kg object, both resting on a fricitionless table, are connected by a massless compressed spring. The spring is released and the objects fly off in opposite directions. The 4.5kg object has a velocity of 6.0m/s to the left. What is the velocity of the 11.0 object?

Explanation / Answer

Here , for the ideal massless spring ,

as there is no external force acting on the system ,

Let the final velocity of 11 kg is v2

Using conservation of momentum ,

-4.5 * 6 + 11 * V2 = 0

v2 = 2.45 m/s

the velocity of 11 kg block is 2.45 m/s to the right

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